Low Sperm Count

My partner (age 54) had a vacectomy reversal in Dec 08 (13 yrs after his vacectomy). His last semen anaysis results in May 09 are set out below. We have been told that due to these results ICSI could help us to have a baby, although due to my age (I will be 45 this month) the chance of success is only 3% as I want to use my own eggs. I have had fertility tests and the results are very good for my age, and I have had a pregancy before (14 yrs ago), but we are still unsure whether we should go ahead with ICSI, due the the costs both financial (£4000)and emotional, considering there is a 97% chance that it will not be successful.

I do wonder what is our chances of conceiving naturally, and are we increasing our chances if we go down the ICSI route at all? Does anyone have any advice, and is there anything we can do to increase our chances naturally? My partner does not smoke, drink and is fit and healthy. I have no children (my partner has 3 from a previous relationship).

Results:

Volume (ml) 5.50. Sperm concentration (ml) 1.40. Motile Count (ml) 0.21. Total Motility 15%. Rapid progression 0%. Slow progression 15%. None progressive 0%. Immotile 85%